A friend of mine suggested this, and I really hope it's not true...
JET and Sully have more, for lack of a better term, "sex appeal" than do Courtney Lee and Brandon Bass. Lee is stil clearly a role player, and Bass, while effective, is fairly boring to watch. JET, on the other hand, is a fierce competitor and clutch shot maker, and Sully is the (to combine metaphors) fountain of untapped potential.
I'm really hoping Doc isn't opting to go with the more exciting players, when really what's best for the team is to go with Lee and Bass and have JET and Sully come off the bench. Then again, it seems very unlike Doc to do that.